def contentChanger(name_list):
    name_list[0], name_list[1] = name_list[1], name_list[0]
    print('函数中的name_list:', name_list)
bank_name = ['农业银行','建设银行']
contentChanger(bank_name.copy())
print('调用函数后的bank_name:', bank_name)
contentChanger(bank_name[:])
print('调用函数后的bank_name:', bank_name)